import { Express } from "express";
import { SentMessageInfo } from "nodemailer";
import ApplicationComponent from "../ApplicationComponent.js";
import MailViewEngine from "../frontend/MailViewEngine.js";
import Mail from "../mail/Mail.js";
export default class MailComponent extends ApplicationComponent {
    private readonly viewEngine;
    private transporter?;
    private readonly additionalLocals;
    constructor(viewEngine: MailViewEngine);
    checkSecuritySettings(): Promise<void>;
    start(app: Express): Promise<void>;
    stop(): Promise<void>;
    sendMail(mail: Mail, ...to: string[]): Promise<SentMessageInfo[]>;
    setAdditionalLocal(key: string, value: unknown): void;
    private getTransporter;
}